Police tactics at the G20 protests have sparked almost 200 complaints from the public.

The Independent Police Complaints Commission revealed the figure as it launched a third investigation after a 23-year-old London man alleged he was assaulted by a Met Police officer.

The man claimed he was assaulted at a police cordon on Cornhill in the City of London some time between 6pm and 7pm on April 1.

The IPCC is already investigating events leading up the death of newspaper seller Ian Tomlinson, who collapsed and died close to the protests on April 1, and an allegation of an assault on Nicola Fisher at a vigil for him on April 2.

An IPCC spokesman said more than 185 complaints have been received relating to G20 of which almost 90 are from alleged victims of - or witnesses to - excessive police force.

A Met Police spokesman said the force is taking steps to identify the officer involved in the latest allegation of assault.

A suspended police officer - a member of the Territorial Support Group - was interviewed under caution for manslaughter on Friday after a second post-mortem examination found Mr Tomlinson died from internal bleeding and not a heart attack as previously thought.

The IPCC has also spoken to Fisher, who is shown in video footage appearing to be struck across the face by an officer and hit with a baton.

A Metropolitan Police sergeant has been suspended from duty while the April 2 incident is investigated.

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